1. Putting the Group Back into Unions: A Social Psychological Contribution to Understanding Union Support
2. Boekkooi, M. E. (2012). Mobilizing protest: The influence of organizers on who participates and why. (Unpublished dissertation). Department of Sociology, VU University, Amsterdam.
3. Brewer, M. B. & Silver, M. D. (2000). Group distinctiveness, social identification, and collective action. In S.Stryker, T. J.Owens & R. W.White (Eds.), Self, identity, and social movements (Vol. 13, pp. 153–171). Minneapolis: University of Minnesota Press.
4. The Individual–Institutional Nexus of Protest Behaviour